/Engine/Plugins/Runtime/RigVM/Source/RigVM/Public/RigVMCore/RigVMTemplate.h
Adds a new argument to the template. The template needs to rely on the delegate to ask the template factory how to deal with the new type.
bool AddTypeForArgument ( const [FName](API\Runtime\Core\UObject\FName) & InArgumentName, [TRigVMTypeIndex](API\Plugins\RigVM\RigVMCore\TRigVMTypeIndex) InTypeIndex )